t28 prob. - GSM-Forum

s4sajii · 08-28-2002, 13:19

i have a t 28 which was dead... when i see the continuty at the battey terminall.. they are short... i remove the pa.... the shortage is gone ... and phone switch on... but when i replace the new pa.. he phone again dead... and shortage on the battery terminalll again...

thanks

Porter · 03-31-2003, 21:22

You have owerhot new PA or made some shortsercuit betvin PA & board. So, You need change PA agane. 100%

kulibin · 03-31-2003, 21:37

Change PA with temperature <270C

OLUJA · 04-01-2003, 16:34

Sometimes when we are heating ,soldering paste (cooler of P.A., ground ,in the middle of P.A.)could go under buzzer,and you have "short cut" about few ohms,and because of that you must be cearfull ( dont put too much soldering paste on the new P.A.);or your temparature is to hight and P.A. is broken again.

cmk · 04-02-2003, 21:22

use old pa cover to new pa and solder it 300c

08-28-2002, 13:19	#1 (permalink)
s4sajii Banned Join Date: Oct 2001 Location: JMB Age: 49 Posts: 1,226 Member: 6919 Status: Offline Thanks Meter: 12	t28 prob. i have a t 28 which was dead... when i see the continuty at the battey terminall.. they are short... i remove the pa.... the shortage is gone ... and phone switch on... but when i replace the new pa.. he phone again dead... and shortage on the battery terminalll again... thanks

04-01-2003, 16:34	#4 (permalink)
OLUJA Insane Poster Join Date: Feb 2003 Location: Belgrade,Serbia Age: 55 Posts: 64 Member: 23157 Status: Offline Thanks Meter: 0	Porter is in right! Sometimes when we are heating ,soldering paste (cooler of P.A., ground ,in the middle of P.A.)could go under buzzer,and you have "short cut" about few ohms,and because of that you must be cearfull ( dont put too much soldering paste on the new P.A.);or your temparature is to hight and P.A. is broken again.

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03-31-2003, 21:22	#2 (permalink)
Porter No Life Poster Join Date: Jan 2003 Location: Ukraine. Lviv Age: 43 Posts: 1,781 Member: 19633 Status: Offline Thanks Meter: 13	You have owerhot new PA or made some shortsercuit betvin PA & board. So, You need change PA agane. 100%

03-31-2003, 21:37	#3 (permalink)
kulibin Freak Poster Join Date: Oct 2002 Age: 41 Posts: 423 Member: 16452 Status: Offline Thanks Meter: 4	Change PA with temperature <270C

04-02-2003, 21:22	#5 (permalink)
cmk No Life Poster Join Date: Mar 2002 Location: Earth Age: 49 Posts: 587 Member: 10387 Status: Offline Thanks Meter: 3	use old pa cover to new pa and solder it 300c